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Circuit Model of DC Machine

Circuit Model of DC Machine: The parallel paths of DC machine armature are symmetrical and each has an induced emf Ea and a resistance Rp. The armature can be represented…

EMF and Torque Equation of DC Machine

EMF and Torque Equation of DC Machine: EMF and Torque Equation of DC Machine - It was shown in Sec. 5.2 (Fig. 5.14 (a)) that in a dc machine the…

Armature Winding in DC Machine

Armature Winding in DC Machine: With reference to the single-coil elementary Armature Winding in DC Machine of Figs 5.13 and 5.14(a) which shows the B-wave of the machine relative to…

2 Pole Elementary DC Machine

2 Pole Elementary DC Machine: Figure 5.13 shows a 2 Pole Elementary DC Machine with a single coil rotating armature. It may be seen that the field winding is stationary…

Special Electrical Machines Interview Questions and Answers

Special Electrical Machines Interview Questions and Answers: Following are the below Special Electrical Machines Interview Questions and Answers, Special Electrical Machines Important Questions and Answers 1. Write down the equation…

Difference between Brushless DC permanent magnet motor and Conventional motor

Difference between Brushless DC permanent magnet motor and Conventional motor: The difference between Brushless DC permanent magnet motor and Conventional motor is given below 1. In the same frame, for…

Constant Current System for Speed Control of DC Motor

Constant Current System for Speed Control of DC Motor: For certain services, where there is a possibility of the motors being stalled such as with excavators, ship's windlasses etc. the…

Booster Speed Control of DC Motor

Booster Speed Control of DC Motor: A booster in series with the armature of the main motor may be employed for varying the voltage across the driving motor. The booster…